and I would like to extract just the peaks that are above a threshold for the score (ex : 100) (5th column)

I have tried with bedtools, but it can just sort them by chromosome then score, and i don't find how to extract just the lines with a score above 100.

I succeed to extract them with unix using sort then tail, but afterward, when I write the output, and try to work with the file, I have an issue since unix don't write the 5th column as integer but as numerical.